Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, Sant Cugat del Valles, Barcelona, Spain.
Int Endod J. 2013 Aug;46(8):769-74. doi: 10.1111/iej.12057. Epub 2013 Mar 28.
To evaluate in vivo the performance of the iPex and Root ZX electronic apex locators (EALs) in the presence of several irrigant solutions: 2.5% sodium hypochlorite (NaOCl) and 2% chlorhexidine (CHX).
Thirty-two single-rooted human teeth that were scheduled for extraction were selected. Teeth with metallic restorations, fractures, root resorption, pulp necrosis or open apices were not included The working length (WL) was determined electronically for the root canals with the iPex and Root ZX EALs in the presence of two different irrigant solutions, 2.5% NaOCl and 2% CHX. After the teeth had been extracted, a size 10 K-file was used to determine the reference working length (RWL), which was established at 0.5 mm short of the major foramen. In each case, the RWL was subtracted from the electronic measurements. Positive values indicated electronic measurements that exceeded the RWL (long measurements), whereas negative values indicated measurements that were short of the RWL. The values obtained with the different irrigants and EALs were compared using the paired t-test. Significance was set at P < 0.05.
The accuracy of the iPex nor Root ZX EAL was not affected by 2.5% NaOCl or 2% CHX (P > 0.05). However, significant differences were observed between the readings of the iPex and Root ZX, irrespective of whether 2.5% NaOCl or 2% CHX was used as the irrigant (P < 0.05). The iPex was less accurate than the Root ZX in determining the RWL.
The accuracy of neither the iPex nor Root ZX EAL was affected by the irrigant used. However, the iPex was less accurate than the Root ZX in determining the RWL both for 2.5% NaOCl and for 2% CHX.
评估 iPex 和 Root ZX 电子根尖定位仪（EAL）在几种冲洗液存在下的体内性能：2.5%次氯酸钠（NaOCl）和 2%洗必泰（CHX）。
选择 32 颗拟拔除的单根人牙。不包括有金属修复体、骨折、根吸收、牙髓坏死或根尖开放的牙齿。使用 iPex 和 Root ZX EAL 确定存在两种不同冲洗液（2.5%NaOCl 和 2%CHX）时根管的工作长度（WL）。牙齿拔除后，使用 10# K 锉确定参考工作长度（RWL），RWL 设定在距大孔 0.5mm 处。在每种情况下，从电子测量值中减去 RWL。正值表示超过 RWL（长测量值）的电子测量值，负值表示短于 RWL 的测量值。使用配对 t 检验比较不同冲洗剂和 EAL 获得的值。P 值<0.05 为差异有统计学意义。
iPex 和 Root ZX EAL 的准确性不受 2.5%NaOCl 或 2%CHX 的影响（P>0.05）。然而，无论使用 2.5%NaOCl 还是 2%CHX 作为冲洗液，都观察到 iPex 和 Root ZX 的读数之间存在显著差异（P<0.05）。iPex 在确定 RWL 方面的准确性不如 Root ZX。
使用的冲洗液对 iPex 和 Root ZX EAL 的准确性均无影响。然而，在确定 RWL 方面，iPex 的准确性均不如 Root ZX，无论是在 2.5%NaOCl 还是在 2%CHX 下。
